Will the 10g sfp+ ports support 1g/gige sfp's (i.e. are the ports 1g and/or 10g capable)?

If you try to use a 1Gbit SFP transceiver that isn’t from MikroTik you will likely at first have problems and it might not work. If this happens you have to go into RouterOS and turn off auto negotiate for that port. You want to manually select the speed as well. Then I’d recommend that you use masking tape or a label maker to mark the physical router so that you or a future user knows that one of the ports has auto negotiate turned off. You’ll actually need to do this with the MikroTik S+RJ10 as well as it has problems sticking too the highest speed your cable can handle (it’s a multi speed 1G/2.5G/5G/10G transceiver) I don’t know if SwitchOS has the same problems.

Do these switches have the ability for mlag? i.e. i want to have two of these as core switches for redundancy.

I don't believe so. You would need to check with MikroTik to see if that feature is available in the Router OS.

Will cisco sfp-10g-sr and sfp-10g-lrm sfp's work in this?

Cisco compatibles have worked well for me. This is not nearly as finicky as a Cisco switch.

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MikroTik CRS309-1G-8S+in

Product ID: 111350480

Details

Brand
MikroTik
Color
White
Compatible Devices
Desktop
Included Components
Power adapter
Number of Ports
9

⚡8x 10G SFP+ ports for ultra-fast connectivity

❄️Compact metal case with efficient heat dissipation

🛠️Managed switch for precise network control

2606 Lei

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Description

⚡ Elevate your network game with MikroTik’s powerhouse switch — speed, control, and style in one sleek package!

COMPACT POWERHOUSE - Weighing just 1.1 lbs and measuring a slim 5.55" x 4.53" x 1.1", it’s the perfect space-saving solution for modern offices.
PLUG PLAY PO E READY - Includes built-in 24V power adapter and supports Power over Ethernet for simplified, clutter-free installations.
TOTAL NETWORK COMMAND - Managed switch capabilities give you granular control over your network, ensuring optimal performance and security.
BLAZING 10 G SFP SPEED - Experience lightning-fast data transfer with 8 high-performance 10G SFP+ ports, perfect for bandwidth-hungry setups.
SLEEK DURABLE DESIGN - Robust metal chassis in a minimalist white finish fits seamlessly into any professional workspace while keeping cool under pressure.

The MikroTik CRS309-1G-8S+IN is a managed gigabit Ethernet switch featuring 8 ultra-fast 10G SFP+ ports and 1 gigabit RJ45 port. Housed in a durable metal case with a compact footprint, it supports Power over Ethernet and comes with a 24V power adapter. Designed for professional environments, it offers precise network management and reliable performance, backed by a 2-year manufacturer warranty.

Specifications

ASIN	B07NFXN4SS
Best Sellers Rank	#171 in Computer Networking Switches
Brand	MikroTik
Built-In Media	Power adapter 24 V 1.2 A, Rack ears, Screw kit
Case Material Type	Metal
Color	White
Compatible Devices	Desktop
Customer Reviews	4.6 4.6 out of 5 stars (379)
Data Transfer Rate	1000 megabits_per_second
Interface	RJ45
Item Dimensions L x W x H	5.55"L x 4.53"W x 1.1"H
Item Weight	1.1 pounds
Manufacturer	MIKROTIK
Mfr Part Number	CRS309-1G-8S+IN
Model Number	CRS309-1G-8S+IN
Number of Items	1
Number of Layers	1
Number of Ports	9
Platform	No Operating System
Switch Type	Managed
Unit Count	1 Count
Upper Temperature Rating	70 °C
Voltage	12 volts
Warranty Description	2 year manufacturer

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2606 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Romania.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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